KR101442668B1 - Compositions water stop of cement-based and waterproof, groutedcolumn method using the same - Google Patents

Abstract

The present invention relates to a cement-based water cut-off material composition that can be used for various constructions such as a water cut-off construction, a waterproof construction, a ground reinforcement construction and the like. The cement-based water cut-off material composition comprises a first water cut-off material composition and a second water cut-off material composition. The first water cut-off material composition includes 15-85 wt% of common Portland cement, 1-30 wt% of fly ash having high fineness, 1-20 wt% of blast furnace slag having high fineness, 1-20 wt% of bottom ash having high fineness, 1-20 wt% of anhydrite or gypsum hemihydrate, and 0.01-10 wt% of zeolite. The second water cut-off material composition includes 50-99 wt% of calcium aluminate (12CaO·7Al2O3) having high fineness and calcium or a magnesium sulfo-aluminate compound, 0.01-10 wt% of potassium aluminum sulfate, 0.01-10 wt% of magnesium oxide, 0.01-10 wt% of sodium silicate, 0.01-10 wt% of alkali metal silicate, 0.01-5 wt% of a polycarboxylic-acid-based dispersant, and 0.01-5 wt% of aluminum powder. The cement-based water cut-off material composition has high strength and excellent durability. According to the present invention, the Na2_O content is very lower than that of the prior cement-based water cut-off material composition. Therefore, the cement-based water cut-off material composition does not pollute underground water and is ecofriendly.

Description

TECHNICAL FIELD The present invention relates to a cement-based index composition and an exponent method using the same,

The present invention relates to a cementitious indexing material composition and an exponent method using the same, and more particularly, to a cementitious indexing material composition excellent in strength, acid resistance and durability by using a quick-setting indexing material having excellent strength and durability will be.

The deterioration of the performance of the concrete structure means that the concrete fails to exert its original function and deteriorates its characteristics over time due to neutralization, salt corrosion, frost, chemical erosion, alkali aggregate reaction, fatigue, weathering, Concrete should be repaired and reinforced regularly because the performance of the concrete gradually deteriorates after a certain period of time after casting or molding.

The deterioration of the performance of the concrete is a crack, and when cracks occur, harmful outside air, moisture and chemical components permeate inside the concrete, thereby further deteriorating the performance of the concrete. In addition, due to the corrosion of the reinforcing bars inside the concrete structure due to moisture and chloride ions penetrating into the concrete, additional cracks occur or concrete falls off, and at the same time, the reinforcing steel section is reduced by the corrosion of the reinforcing bars, The structure is damaged.

On the other hand, the most widely used concrete structures have been intrinsic to the problems related to leakage, and proper maintenance and reinforcement methods are insufficient. It is a method of applying an epoxy type putty to the leaking part by means of the index method of leakage of existing concrete structure, or injecting foamed urethane (Urethane) or Epoxy type index material by perforating the leaked part .

However, the conventional index method using these synthetic resin series provides a temporary exponential effect, but over time, the inflow part of the inflow water can not be blocked, leading to an index failure. Especially, the use of improper injection repellent accelerates the neutralization of the concrete structure It is not possible to absorb the flow of the concrete structure, resulting in peeling between the matrix and the exponent, which causes cracking again. This is because the path and cause of the leak can not be grasped properly, and the infusion repair agent has been vaguely repaired without proper examination of proper characteristics and construction methods.

In the case of conventional index material, it is not water-soluble but oily type. It can not be mixed with only cement and index material. It is mixed with general cement after mixing special agent and index material of powder type rather than general cement or mortar. However, the conventional index material is superior in terms of performance to quick-setting, but it is expensive at a price of four to five times that of quick-setting and has a disadvantage that it is impossible to work underwater.

On the other hand, in case of quick-setting, the curing time of the concentrate is about 1 hour and the curing time of 12 hours or more is required when milk grouting (cement + fastening + water concentration is made to be milk) is relatively inexpensive. Further, in the case of the quick-setting concentrate, hardening occurs quickly but the strength is lowered. As in the case of the conventional index material, it can not be condensed in the water and scattered, making it impossible to work underwater.

Disclosure of Invention Technical Problem [8] The present invention provides an index material composition capable of solving the problems of conventional index materials and rapid setting and capable of working in water.

The present invention also aims to provide an index material composition capable of curing a mortar or concrete structure in a short period of time. Furthermore, the present invention aims to provide an index composition capable of extending the durability life of a concrete structure by repairing leaks, cracks, and the like, and an index composition capable of being applied to soil grouting.

Another object of the present invention is to provide a method of manufacturing a cementitious index material composition and an exponent method which are excellent in properties such as strength, water resistance, chemical resistance, acid resistance, durability and salt resistance when exposing a concrete structure.

The present invention consists of a first index material composition and a second index material composition. A first index material composition consists of ordinary portland cement, and other mixtures sense mounds, a second index material composition mounds say consists of calcium aluminate (12CaO · 7Al ₂ O ₃₎ and calcium or magnesium sulfonate aluminate mixture and additives .

The first index composition is used in a weight ratio of 1: 1 to 3: water composition. The second index material composition is used in a weight ratio of 1: 1 to 6 in the powder composition and water. The first powder composition of the index material composition fineness is 5,000 ~ 10,000cm ² / g mounds say ordinary Portland cement of 15 to 85% by weight, the powder is also a 4,000cm ² / g or more mounds say 1 to 30% by weight of fly ash 1 to 20% by weight of a high-malleability blast furnace slag having a powder degree of 5,000 cm ² / g or more, 1 to 20% by weight of a high-malt sludge bottom ash having a powder degree of 5,000 cm ² / g or more, 0.01 to 10% by weight.

The powder composition of the first indexer composition may further comprise 0.01 to 10% by weight of titanium oxide.

The powder composition of the first indexer composition may further comprise 0.01 to 5% by weight of a polycarboxylic acid-based water reducing agent.

The powder composition of the second exponential composition comprises 50 to 99% by weight of a calcium or magnesium sulfoaluminate mixture with a high-crystalline calcium aluminate (12CaO · 7Al ₂ O ₃ ) having a powder degree of 5,000 to 10,000 cm ² / g, 0.01 to 10 wt% of potassium, 0.01 to 10 wt% of magnesium oxide, 0.01 to 10 wt% of sodium silicate, 0.01 to 10 wt% of alkali metal silicate, 0.01 to 5 wt% of polycarboxylic acid dispersant, and 0.01 to 5 wt% . ≪ / RTI >

The mixing ratio of the calcium aluminate (12CaO · 7Al ₂ O ₃ ) and the calcium or magnesium sulfoaluminate is mixed in the range of 80:20 to 20:80 wt%. When the calcium aluminate (12CaO · 7Al ₂ O ₃ ) is used in an amount of 80% by weight or more, the second composition itself can not be used due to the occurrence of sharpness. When mixed with 20% by weight or less, The function of the ashes is deteriorated.

The powder composition of the second exponential ingredient composition uses a material separation inhibitor to form a stable composition by imparting cohesive force and material separation preventive property. The material separation preventing agent may further include 0.01 to 5% by weight of a mixture of polyvinyl alcohol and starch in a weight ratio of 0.1 to 0.9: 0.1 to 0.9.

In addition, the powder composition of the second exponential composition may further contain 0.01 to 5% by weight of methyl methacrylate-butyl acrylate (MMA / BA).

The present invention also includes a step of confirming a leakage area of the concrete structure in which leakage occurs, a pretreatment step of chipping the leaked area by a grinder or the like on the confirmed leaked area, drilling the pretreated leaked area, Inserting a packer; Applying a quick-setting mortar to the leaking portion after the step of inserting the packer and sealing the leaking portion; After sealing the leak portion to the rigid mortar in injecting into 15kgf / cm ² to 500kgf / cm ² pressure to the cementitious composition index material into the perforation; Removing the packer after the water leakage blocking is confirmed; It provides an exponential method of repairing the leakage area after removing the packer by using the cross-sectional restoration material. At this time, in the step of injecting the cementitious index composition, the first index material composition is injected first, and then the second index material composition is injected, reacted and exponentially expelled. Also, the above-mentioned cross-sectional restoration material comprises 15 to 70 wt% of cement binder, 20 to 75 wt% of fine aggregate, 0.01 to 20 wt% of polymer admixture and 0.1 to 20 wt% of water, Wherein the cement admixture comprises 50 to 99% by weight of water, 0.1 to 30% by weight of aqueous urethane, 0.1 to 20% by weight of polystyrene-butylacrylate and 0.1 to 20% by weight of styrene-butadiene, 1 to 20% by weight of anhydrous gypsum, 1 to 15% by weight of calcium or magnesium sulfoaluminate, 0.01 to 10% by weight of magnesium oxide, 0.01 to 5% by weight of calcium carbonate or magnesium sulfoaluminate, 10 to 35% by weight of blast furnace slag, 5 to 30% It is preferable to use a cross-sectional restorative material containing 10 to 10% by weight of calcium silicate, 0.01 to 10% by weight of a kiln dust, 0.01 to 10% by weight of a polycarboxylic acid-based water reducing agent and 0.01 to 10% by weight of calcium silicate.

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INDUSTRIAL APPLICABILITY According to the present invention, there is an effect that strength, water resistance and durability are greatly improved by using a first index material composition excellent in strength and durability, a second index material composition having excellent acid resistance, water resistance and durability and fast-

In addition, the present invention provides an inorganic-based index material composition capable of using the existing mineral-based index material as well as the number of mixers. INDUSTRIAL APPLICABILITY The indexing composition of the present invention can provide an indexing composition having a high strength while satisfying the gel time characteristic of conventional inorganic indexing materials.

Further, since the content of Na ₂ O contained in the index material is much lower than that of the conventional index material, the index material composition of the present invention is environmentally friendly because there is no fear of groundwater contamination.

In addition, the index composition of the present invention can be used as it is with conventional apparatuses, since the conventional silicate-based index re-injection equipment is used as it is and the injection of the finished and finished agents is sufficiently performed by conventional equipment.

Hereinafter, preferred embodiments according to the present invention will be described in detail. However, it should be understood that the following embodiments are provided so that those skilled in the art will be able to fully understand the present invention, and that various modifications may be made without departing from the scope of the present invention. It is not.

A first index material composition and a second index material composition according to a preferred embodiment of the present invention. A first index material composition consists of ordinary portland cement, and other mixtures sense mounds, a second index material composition mounds say consists of calcium aluminate (12CaO · 7Al ₂ O ₃₎ and calcium or magnesium sulfonate aluminate mixture and additives .

The first index composition is used in a weight ratio of 1: 1 to 3: water composition. The first powder composition of the index material composition fineness is 5,000 ~ 10,000cm ² / g mounds say ordinary Portland cement of 15 to 85% by weight, the powder is also a 4,000cm ² / g or more mounds say 1 to 30% by weight of fly ash 1 to 20% by weight of a high-malleability blast furnace slag having a powder degree of 5,000 cm ² / g or more, 1 to 20% by weight of a high-malt sludge bottom ash having a powder degree of 5,000 cm ² / g or more, 0.01 to 10% by weight.

The powder composition of the first indexer composition may further comprise 0.01 to 10% by weight of titanium oxide.

The powder composition of the first indexer composition may further comprise 0.01 to 5% by weight of a polycarboxylic acid-based water reducing agent.

It is preferable that the ordinary Portland cement uses cement conforming to the KS standard. The ordinary Portland cement not only supplies calcium ions that can accelerate the initial reaction of CSA cement but also is an important component for improving long-term strength and durability. Considering the reaction rate and penetration characteristics, it is preferable to use portland cement as a high-purity powder having a viscosity of 5,000 to 10,000 cm ² / g. It is preferable that the above-mentioned high-molecular-weight Portland cement usually contains 15 to 85% by weight in the first index material composition.

The fly ash is used for improving pozzolanic characteristics, long-term strength development and durability. When the weight ratio of the fly ash is increased, the early strength is lowered, but the long-term strength development and durability are increased. Considering the reaction rate and the permeation characteristics, it is preferable to use a high-solids fly ash of 4,000 cm ² / g because the higher the degree of the powder is, the more advantageous it is. The above-mentioned high-molecular-weight fly ash is preferably contained in the first index material composition in an amount of 1 to 30% by weight. If the content of the fly ash is less than 1% by weight, the initial strength and the spinning performance are good, but the long-term strength and durability improvement effect may be deteriorated. When the content of the fly ash exceeds 30% by weight, Poor workability and manufacturing cost are not economical.

The blast furnace slag is used for improving latent hydraulic characteristics, long-term strength development and durability. When the weight ratio of the blast furnace slag is increased, the early strength is lowered, but the long-term strength development and durability are increased. Also, considering the reaction rate and the penetration characteristics, it is preferable to use a high-molecular-weight blast furnace slag having a specific surface area of 5,000 cm ² / g. It is preferable that the high-malleolar blast furnace slag is contained in the first index material composition in an amount of 1 to 20% by weight. If the content of the blast furnace slag is less than 1% by weight, the blast furnace slag may have a good run performance but a long-term strength and durability may be deteriorated. If the blast furnace slag content exceeds 20% by weight, have.

The bottom ash is a material generated from a thermal power plant, and has potential hydraulic properties as an industrial waste, but is used for the development of long-term strength and the improvement of durability. The water content is low due to the high water content of the material itself. Considering the reaction rate and the permeation characteristics, it is preferable to use a high-solids, low-ash ash of 5,000 cm ² / g, since the higher the degree of the powder is, the more advantageous. The above-mentioned high-molecular-weight bottom ash is preferably contained in the first index material composition in an amount of 1 to 20% by weight. If the content of the bottom ash is less than 1% by weight, the long-term strength and durability may be deteriorated. If the content of the bottom ash exceeds 20% by weight, the workability is improved but the absorption rate is increased.

The anhydride or half of gypsum (CaSO ₄₎ is there is generated a component, in particular _{C 3 A (3CaOAl 2 O 3} ) reacts with Et Lin ZUID initially (AFt _{phase, C 3 A3CaSO 4 32H 2 O} ) of the cement, As the hydration proceeds, the resulting ettringite is reduced in amount or a part thereof is transferred to monosulfate (AFm phase, C ₃ ACaSO _{4 12} H ₂ O). When a large amount of anhydrous or semi-gypsum is added as in the present invention, etrinzite is sufficiently generated from the beginning to densify the structure of the cement, thereby increasing penetration resistance against chloride ions in the early age. In addition, in the case of general cement, the produced etlin zeite is mainly present at the initial stage. However, since the first index material composition of the present invention is sufficiently added with the amount of gypsum, the etlin zeite is partially present in the long- Of the ettringite are continuously produced. The nitrite produced in this way increases the penetration resistance to chlorides even in the long term by densely filling the pores in the concrete structure. In addition, since the anhydrous or semi-gypsum plaster produces an inflatable hydrate when water is supplied, it helps to restore and repair the cracks that are generated later. It is preferable that the anhydrous or semi-gypsum is contained in the first index material composition in an amount of 1 to 20% by weight. If the content of the anhydrous or semi-gypsum is less than 1% by weight, the strength and toughness may be deteriorated. If the content of the anhydrous or semi-gypsum exceeds 20% by weight, good physical properties can be obtained due to rapid curing properties Poor workability and manufacturing cost are not economical.

The zeolite acts as a sorbent material as a porous inorganic material. The zeolite is preferably contained in the first index material composition in an amount of 0.01 to 10% by weight. When the content of the zeolite is less than 0.01% by weight, the hydrophilic property and the viscosity-improving effect may be insignificant. When the content of the zeolite is more than 10% by weight, And the manufacturing cost is high, which is not economical.

The first index material composition may further comprise titanium oxide. The titanium oxide can be used for antiseptic and antimicrobial functions. The titanium oxide is preferably contained in the first index material composition in an amount of 0.01 to 10% by weight. When the weight ratio of the titanium oxide is increased, the antifouling performance is exhibited. When the content of the titanium oxide is less than 0.01 wt%, the effect of preservation, antibacterial and antifouling performance may be weak. When the content of the titanium oxide is more than 10 wt% Is not economical because the intensity is lowered and the manufacturing cost is increased.

In addition, the first indexer composition may further include a polycarboxylic acid-based water reducing agent. The water reducing agent is used to reduce the water-cement ratio of the first index material composition to improve strength and durability. The water reducing agent may be a polycarbonate-based, melamine-based or naphthalene-based fluidizing agent. The melamine- or naphthalene-based water reducing agent is less effective in improving the strength and durability than the polycarboxylic acid-based water reducing agent, and the water-cement ratio reduction effect is not so small. It is preferable that the polycarboxylic acid-based water reducing agent is contained in the first index material composition in an amount of 0.01 to 5% by weight.

The second index material composition is used in a weight ratio of 1: 1 to 6 in the powder composition and water.

The powder composition of the second exponential composition comprises 50 to 99% by weight of a calcium or magnesium sulfoaluminate mixture with a high-crystalline calcium aluminate (12CaO · 7Al ₂ O ₃ ) having a powder degree of 5,000 to 10,000 cm ² / g, 0.01 to 10 wt% of potassium, 0.01 to 10 wt% of magnesium oxide, 0.01 to 10 wt% of sodium silicate, 0.01 to 10 wt% of alkali metal silicate, 0.01 to 5 wt% of polycarboxylic acid dispersant, and 0.01 to 5 wt% . ≪ / RTI >

The powder composition of the second exponential ingredient composition uses a material separation inhibitor to form a stable composition by imparting cohesive force and material separation preventive property. The material separation preventing agent may further include 0.01 to 5% by weight of a mixture of polyvinyl alcohol and starch in a weight ratio of 0.1 to 0.9: 0.1 to 0.9.

In addition, the powder composition of the second exponential composition may further contain 0.01 to 5% by weight of methyl methacrylate-butyl acrylate (MMA / BA).

The mixture of calcium aluminate (12CaO · 7Al ₂ O ₃ ) and calcium or magnesium sulfoaluminate is an inorganic fast hard mineral material which increases hydration reactivity and is added to inhibit cracking. It reacts with water in an instant when it comes into contact with water By producing an Ettringite hydrate, excellent compressive strength can be obtained in a short time when mixed with cement. The mixture of calcium aluminate (12CaO · 7Al ₂ O ₃ ) and calcium or magnesium sulfoaluminate is preferably contained in the powder composition of the second exponential composition by 50 to 99 wt%. In order to improve the reaction rate and the penetration performance, it is preferable to use a high-maltose powder having a powder degree of 5,000 to 10,000 cm ² / g. When the weight ratio of the calcium or magnesium aluminate to the calcium or magnesium sulfoaluminate mixture is increased, fast curing properties are exhibited. When the weight ratio is less than 50 wt%, it is difficult to exhibit the quick-setting characteristics, have

Also, the mixing ratio of the calcium or magnesium aluminate and the calcium or magnesium sulfoaluminate is mixed in the range of 80:20 to 20:80% by weight. When the calcium or magnesium aluminate is used in an amount of 80 wt% or more, the second composition itself may not be used due to the occurrence of sharpness. If the calcium or magnesium aluminate is used in an amount of 20 wt% or less, the index material may not exhibit quick-setting properties.

The potassium aluminum sulfate is used to compensate for the shrinkage of the hardened cement when a small amount is added to the cement so as to prevent cracks and durability deterioration caused by autogenous shrinkage and drying shrinkage of the hardened cement. The aluminum potassium sulfate is preferably contained in an amount of 0.01 to 10% by weight in the powder composition of the second index composition. When the weight ratio of the aluminum sulfate is increased, the swelling effect is exhibited. When the content of the potassium aluminum sulfate is less than 0.01 wt%, the shrinkage compensation effect may be insufficient. When the content of the aluminum sulfate is more than 10 wt% Cracks may occur due to excessive expansion.

The magnesium oxide is used as an inorganic flame retardant material. The magnesium oxide has a formula MgO and a compounding amount of 40.3. The magnesium oxide is also called goto (industrial grade), the industrial product is called magnesia, and the medicine is called magnesia woaster. The magnesium oxide has a melting point of about 2826 ° C, a boiling point of about 3600 ° C, a specific gravity of 3.65, a cubic crystal system solubility of 0.62mg / 100g, and a refractive index of 1.7364. Magnesium oxide is obtained by heating metallic magnesium in air, and industrially, magnesium carbonate (magnesite), magnesium hydroxide carbonate, magnesium hydroxide and the like are calcined. Magnesium oxide is a white crystalline solid, chemically relatively inert. Magnesium oxide is only slightly soluble in water, but it dissolves in dilute acid. Magnesium oxide slowly absorbs water and carbon dioxide gas in the air and becomes magnesium hydroxide carbonate. Magnesium oxide is very reflective (visible) and near-ultraviolet (reflectivity) and is used as a reflector or white standard in optics. Magnesium oxide is industrially used as a raw material for magnesia cement, steelmaking furnace material and refractory brick tile.

The magnesium oxide is used for improving the flame retardancy. It is preferable that the magnesium oxide is contained in the powder composition of the second indexer composition in an amount of 0.01 to 10% by weight, and when the magnesium oxide content is more than 10% by weight, the flame retardancy is improved but the workability and strength may be lowered If the content of magnesium oxide is less than 0.01 wt%, the workability and strength are increased but the flame retardant effect may be weak.

Said silicate is characterized by being imparted with initial workability, adhesiveness, acid resistance, heat resistance, water resistance and being solidified by carbon dioxide. When the weight ratio of the sodium silicate is increased, workability is lowered, but adhesiveness, acid resistance, heat resistance and water resistance are improved. The sodium silicate is preferably contained in an amount of 0.01 to 10% by weight in the powder composition of the second index composition. If the content of the sodium silicate is more than 10% by weight, the adhesive property, the acid resistance and the water resistance are improved but the price competitiveness may be lowered. If the content of the sodium silicate is less than 0.01% by weight, the effect of improving the water resistance and durability may be weak .

The alkali metal silicates are used to improve alkali imparting, water resistance and durability. If the content of the alkali metal silicate is more than 10% by weight, the water resistance and durability may be improved, but the price competitiveness may be deteriorated. If the content of the alkali metal silicate is less than 0.01% by weight, the effect of improving water resistance and durability may be weak. The alkali metal silicate may be selected from at least one of calcium silicate, potassium silicate and lithium silicate.

The polycarboxylic acid-based dispersant is used for improving fluidity and workability by improving the dispersing effect of the composition. It is preferable that the polycarboxylic acid-based dispersant is contained in the powder composition of the second exponential composition by 0.01 to 5% by weight. If the content of the polycarboxylic acid-based dispersant exceeds 5% by weight, the material is likely to be separated. If the content is less than 0.01% by weight, the strength, workability and pot life of the composition may be lowered.

The aluminum powder is used to improve the initial steepness and expansion effect to increase the filling effect. The aluminum powder is preferably contained in an amount of 0.01 to 5% by weight. If the content of the aluminum powder exceeds 5% by weight, the reaction rate is increased and workability and pot life are lowered. If the content is less than 0.01% by weight, the initial curing time may be delayed.

The second exponential component may further comprise a mixture of polyvinyl alcohol and starch. The mixture of polyvinyl alcohol and starch can contribute to forming a stable concrete structure by imparting fluidity, cohesive force and material separation prevention property. In addition, it can prevent pollution in water due to excellent cohesive force, protect reinforcing of concrete structure, And so on. It is preferable that the mixture of polyvinyl alcohol and starch is contained in the powder composition of the second exponential composition by 0.01 to 5% by weight. If the content of the mixture of polyvinyl alcohol and starch is more than 5% by weight, the viscosity of the composition may be increased and the workability may be lowered. If the content of the mixture of polyvinyl alcohol and starch is less than 0.1% by weight, The effect of imparting fluidity, cohesive force and material separation prevention property may be weak. The mixture of polyvinyl alcohol and starch is preferably a mixture of polyvinyl alcohol and starch in a weight ratio of 0.1 to 0.9: 0.1 to 0.9 in order to impart a cohesive force and a material separation preventing property to form a stable exponent composition .

In addition, the powder composition of the second index material composition is used not only to maintain the workability by lowering viscosity but also to improve water retention. In addition, it may further include 0.01 to 5% by weight of methyl methacrylate-butyl acrylate (MMA / BA) in order to improve the acid resistance and alkali resistance and to improve the strength. If the content of the methyl methacrylate-butyl acrylate (MMA / BA) exceeds 5% by weight, the performance of the composition may be improved but the price competitiveness may be deteriorated. The content of the methyl methacrylate-butyl acrylate (MMA / BA) Is less than 0.01% by weight, the workability of the composition is improved but the effect of improving acid resistance, alkali resistance and water retention can be weak.

Hereinafter, a method for producing a cementitious indexing material composition according to a preferred embodiment of the present invention will be described.

The cementitious index regimen composition according to a preferred embodiment of the present invention may be prepared by forcibly mixing (for 1 to 3 minutes) 1: 1 to 3 in a weight ratio of the powder composition of the first index material composition to water in a first mixer A first index material composition is prepared. In the second blender, the second exponential composition is prepared by forced mixing with the powder composition of the second exponential composition at a weight ratio of water of 1: 1 to 6 for a predetermined time (for example, 1 to 3 minutes).

Hereinafter, an exponential method using the above-mentioned cementitious index composition will be presented.

The exponent method according to the preferred embodiment of the present invention includes the steps of confirming a leakage area of a concrete structure in which leakage is generated, a pre-treatment step of chipping the leakage area by a grinder or the like on the confirmed leakage area, Drilling, drilling, and inserting a packer into the perforation; Applying a quick-setting mortar to the leaking portion after the packer inserting step and sealing the leaking portion; After sealing the leak portion to the rigid mortar in the step of injecting into 15kgf / cm ² to 500kgf / cm ² pressure to the cementitious composition index material into the perforation; Removing the packer after the water leakage blocking is confirmed, and repairing the water leakage portion using the sectional restoration material after removing the packing.

At this time, in the step of injecting the cementitious index composition, the first index material composition is injected first, and then the second index material composition is injected, reacted and exponentially expelled.

Also, the above-mentioned cross-sectional restoration material comprises 15 to 70 wt% of cement binder, 20 to 75 wt% of fine aggregate, 0.01 to 20 wt% of polymer admixture and 0.1 to 20 wt% of water, Wherein the cement admixture comprises 50 to 99% by weight of water, 0.1 to 30% by weight of aqueous urethane, 0.1 to 20% by weight of polystyrene-butylacrylate and 0.1 to 20% by weight of styrene-butadiene, 1 to 20% by weight of anhydrous gypsum, 1 to 15% by weight of calcium or magnesium sulfoaluminate, 0.01 to 10% by weight of magnesium oxide, 0.01 to 5% by weight of calcium carbonate or magnesium sulfoaluminate, 10 to 35% by weight of blast furnace slag, 5 to 30% It is preferable to use a cross-sectional restorative material containing 10 to 10% by weight of calcium silicate, 0.01 to 10% by weight of a kiln dust, 0.01 to 10% by weight of a polycarboxylic acid-based water reducing agent and 0.01 to 10% by weight of calcium silicate.

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Hereinafter, examples of the cementitious indexing material composition according to the present invention will be more specifically shown, and the present invention is not limited by the following examples.

The first exponential composition was prepared by adding 30% by weight of the powder composition and 70% by weight of water and stirring with a forced mixer for 2 minutes.

At this time, the powder composition was composed of 70% by weight of Portland cement, 10% by weight of high-maltogenic fly ash, 5% by weight of high-maltose blast furnace slag, 5% by weight of high-malt sludge bottom ash, 5% by weight of anhydrous or semi- %, Titanium oxide 2% by weight, and polycarboxylic acid-based water reducing agent 1% by weight.

The second exponential composition was prepared by adding 30% by weight of the powder composition and 70% by weight of water and stirring with a forced mixer for 2 minutes.

In this case, the powder composition mounds say calcium aluminate (12CaO · 7Al ₂ O ₃₎ and calcium sulfo aluminate mixture of 88% by weight, 2% by weight of aluminum sulfate, potassium 2% by weight of magnesium oxide, 2% by weight sodium silicate, alkali metal (MMA / BA) of 2% by weight of carbonates, 2% by weight of alkali metal silicate, 1% by weight of polycarboxylic acid dispersant, 1% by weight of aluminum powder, 1% And mixed. Meanwhile, the mixing ratio of calcium aluminate (12CaO · 7Al ₂ O ₃ ) and calcium sulfoaluminate was 50:50 wt%.

The first exponential composition was prepared by adding 40% by weight of the powder composition and 60% by weight of water and stirring with a forced mixer for 2 minutes.

At this time, the powder composition was composed of 70% by weight of Portland cement, 10% by weight of high-maltogenic fly ash, 5% by weight of high-maltose blast furnace slag, 5% by weight of high-malt sludge bottom ash, 5% by weight of anhydrous or semi- %, Titanium oxide 2% by weight, and polycarboxylic acid-based water reducing agent 1% by weight.

The second exponential composition was prepared by adding 40% by weight of the powder composition and 60% by weight of water and stirring with a forced mixer for 2 minutes.

In this case, the powder composition mounds say calcium aluminate (12CaO · 7Al ₂ O ₃₎ and calcium sulfo aluminate mixture of 88% by weight, 2% by weight of aluminum sulfate, potassium 2% by weight of magnesium oxide, 2% by weight sodium silicate, alkali metal 2% by weight of silicate, 1% by weight of a polycarboxylic acid dispersant, 1% by weight of an aluminum powder, 1% by weight of a material separation inhibitor and 1% by weight of methyl methacrylate-butyl acrylate (MMA / BA). Meanwhile, the mixing ratio of calcium aluminate (12CaO · 7Al ₂ O ₃ ) and calcium sulfoaluminate was 50:50 wt%.

The first exponential composition was prepared by adding 45% by weight of the powder composition and 55% by weight of water and stirring with a forced mixer for 2 minutes.

At this time, the powder composition was composed of 70% by weight of Portland cement, 10% by weight of high-maltogenic fly ash, 5% by weight of high-maltose blast furnace slag, 5% by weight of high-malt sludge bottom ash, 5% by weight of anhydrous or semi- %, Titanium oxide 2% by weight, and polycarboxylic acid-based water reducing agent 1% by weight.

The second exponential composition was prepared by adding 45 wt% of the powder composition and 55 wt% of water and stirring with a forced mixer for 2 minutes.

In this case, the powder composition mounds say calcium aluminate (12CaO · 7Al ₂ O ₃₎ and calcium sulfo aluminate mixture of 88% by weight, 2% by weight of aluminum sulfate, potassium 2% by weight of magnesium oxide, 2% by weight sodium silicate, alkali metal 2% by weight of silicate, 1% by weight of a polycarboxylic acid dispersant, 1% by weight of an aluminum powder, 1% by weight of a material separation inhibitor and 1% by weight of methyl methacrylate-butyl acrylate (MMA / BA). Meanwhile, the mixing ratio of calcium aluminate (12CaO · 7Al ₂ O ₃ ) and calcium sulfoaluminate was 50:50 wt%.

Comparative Examples which can be compared with the embodiments of the present invention are shown in order to more easily grasp the characteristics of Examples 1 to 3. Comparative Examples 1 and 2 to be described later are examples of the common cement A mortar composition and a polymer-cement mortar composition.

[Comparative Example 1]

The first index material composition was usually prepared by adding 30 wt% of Portland cement and 70 wt% of water and stirring with a forced mixer for 2 minutes to obtain a first index material composition.

The second indexer composition was prepared by adding 30% by weight of sodium silicate and 70% by weight of water and stirring with a forced mixer for 2 minutes to obtain a second index material composition.

[Comparative Example 2]

The first exponential composition was prepared by adding 40 wt% of Portland cement and 60 wt% of water and stirring with a forced mixer for 2 minutes.

The second indexable composition was prepared by adding 40 wt% of sodium silicate and 60 wt% of water and stirring with a forced mixer for 2 minutes.

[Comparative Example 3]

The first exponential composition was prepared by adding 45 wt% of Portland cement and 55 wt% of water and stirring with a forced mixer for 2 minutes.

The second indexable composition was prepared by adding 45 wt% of sodium silicate and 55 wt% of water and stirring with a forced mixer for 2 minutes to obtain a second index material composition.

The following test examples show experimental results comparing characteristics of the embodiments of the present invention with those of Comparative Examples 1 to 3 in order to more easily grasp the characteristics of Embodiments 1 to 3 according to the present invention .

[Test Example 1]

In order to compare the physical properties of the cementitious indexing material composition prepared according to Examples 1 to 3 and the composition prepared in Comparative Examples, the cementitious indexing material composition prepared according to Examples 1 to 3 described above The compositions prepared according to Comparative Example 1 and Comparative Example 2 were subjected to a compression strength test by gel time and KS L 5105, and the results are shown in Table 1 below.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Gel time (sec) 10 6 3 8 5 2 compression
burglar
(MPa) 1 day 2.1 4.6 5.2 1.7 3.1 3.6 3 days 3.2 6.5 8.3 1.9 3.9 4.3 7 days 4.9 13.3 16.2 2.4 4.4 5.1 28th 7.0 17.6 22.3 3.2 6.2 6.9

As shown in Table 1, the gel time of the cementitious index composition prepared according to Examples 1 to 3 was slightly delayed compared with the compositions prepared according to Comparative Examples 1 to 3 using sodium silicate glass, And long-term compressive strength were higher than those of the compositions prepared according to Comparative Examples 1 to 2. Especially, the increase of strength was remarkably higher in the long-term age.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, This is possible.

Claims (11)

Fineness is 5,000 ~ 10,000cm ² / g mounds say ordinary Portland cement 15 to 85% by weight, the powder is also a 4,000cm ² / g or more mounds say fly ash 1-30% by weight, the powder is also a 5,000cm ² / g or more of 1 to 20% by weight of a high-malt sprout slag and 1 to 20% by weight of a high-malt sprout bottom ash having a powder degree of 5,000 cm ² / g or higher, 1 to 20% by weight of anhydrous or semi-gypsum and 0.01 to 10% by weight of zeolite A first index material composition which is a powder composition;
50 to 99% by weight of a mixture of high-calcium calcium aluminate (12CaO · 7Al ₂ O ₃ ) having a powder degree of 5,000 to 10,000 cm ² / g and calcium or magnesium sulfoaluminate, 0.01 to 10% by weight of aluminum potassium sulfate, Which is a powder composition composed of 10 to 10% by weight of sodium silicate, 0.01 to 10% by weight of sodium silicate, 0.01 to 10% by weight of an alkali metal silicate, 0.01 to 5% by weight of a polycarboxylic acid- An index material composition;
Wherein the first index material composition is mixed at a weight ratio of the powder composition and water at a ratio of 1: 1 to 3, and the second index material composition is mixed at a weight ratio of the powder composition and water at a ratio of 1: 1 to 6: Composition. delete delete The cementitious index composition according to claim 1, wherein the powder composition of the first indexer composition further comprises 0.01 to 10% by weight of titanium oxide. The cementitious index regimen composition according to claim 1, wherein the powder composition of the first indexer composition further comprises 0.01 to 5% by weight of a polycarboxylic acid-based water reducing agent. delete The composition of claim 1, wherein the powder composition of the second exponential composition further comprises a material separation inhibitor to form a stable composition by imparting cohesive force and material separation prevention property, wherein the material separation inhibitor comprises polyvinyl alcohol and starch Further comprising 0.01 to 5% by weight of a mixture obtained by mixing 0.1 to 0.9: 0.1 to 0.9% by weight of the cement composition. The cementitious index composition according to claim 1, wherein the powder composition of the second indexer composition further comprises 0.01 to 5% by weight of methyl methacrylate-butyl acrylate (MMA / BA). Confirming the leaked portion of the concrete structure in which leakage occurs;
A pretreatment step of chipping the leaked portion with the grinder or the like for the confirmed leaked portion;
Drilling the pre-treated leak area, inserting a packer in the puncture site;
Applying a quick-setting mortar to the leaking portion after the packer inserting step and sealing the leaking portion;
Injecting a 15kgf / cm ² to 500kgf / cm ² pressure and then sealing the leak portion to the cement mortar in a rigid index material composition according to claim 1 into the perforation and;
Removing the packer after the water leakage is confirmed, and repairing the water leakage part using the cross-sectional restoration material after removing the packer. The method according to claim 9, wherein the cross-sectional restoration material comprises 15 to 70 wt% of cementitious binder, 20 to 75 wt% of fine aggregate, 0.01 to 20 wt% of polymer admixture, and 0.1 to 20 wt% - 50 to 99% by weight of methyl methacrylate, 0.1 to 30% by weight of aqueous urethane, 0.1 to 20% by weight of polystyrene-butyl acrylate and 0.1 to 20% by weight of styrene-butadiene, 10 to 65 wt% of cement, 10 to 35 wt% of blast furnace slag, 5 to 30 wt% of fly ash, 1 to 20 wt% of meta kaolin, 1 to 20 wt% of anhydrous gypsum, 1 to 15 wt% of calcium or magnesium sulfoaluminate, 0.01 to 10% by weight of magnesium oxide, 0.01 to 10% by weight of a kiln dust, 0.01 to 10% by weight of a polycarboxylic acid-based water reducing agent, and 0.01 to 10% by weight of calcium silicate. delete